Which car models have a speedometer that goes up to 300km/h?
1 Answers
Models such as the Focus RS, Audi A4L 2.0T low-power version, Audi A6, A7, A8, Cadillac CT6, and Regal GS all have speedometers that go up to 300km/h. The speedometer's maximum indicated speed refers to the highest speed displayed on the car's speedometer. Generally, for the protection of the engine and safety considerations, the regulated maximum speed is only about 80% of the actual limit speed. The maximum speed of a car is mainly influenced by the engine's maximum power, the air resistance encountered during high-speed driving, and the total transmission ratio of the car's drivetrain. The specific details are as follows: Engine's maximum power: The engine's maximum power is the decisive factor in determining the car's top speed. Only when the engine outputs its maximum power and the car is moving at a constant speed does the car reach its top speed. Air resistance during high-speed driving: Among the various resistances a car faces while driving, air resistance has the greatest impact. When a car is moving at its top speed, it means the driving force has balanced with the total resistance, primarily air resistance. If the maximum power is constant, the lower the air resistance, the higher the car's top speed. Total transmission ratio of the car's drivetrain: The transmission ratio of the car's drivetrain limits the ratio between the engine speed and the wheel speed, naturally restricting the maximum rotational speed of the wheels and thus the car's top speed.
